in addition, president obama, george w. bush, president clinton and president carter will be there. raul castro will be there. will mandela's message of forgiveness resonate? and a time crunch of epic proportions, will the venue be safe? first on the security front. joy worked -- joe worked on sec for pope john paul's funeral. what could go wrong? but a lot could go wrong. >> yeah, south africa's not entirely a safe place. you have a large somali community there, with connections to shabaab. monitoring these will not be easy. you have the problem of a lot of weapons coming through africa, central african republic, libya and the rest of it. so there is the potential danger to secure all these people. >> the u.s. delegation a small part of the crowd. how much control can the u.s. secret service have, realistically? >> well, it's entirely up to the host government. the south african government has hosted u.s. presidential visits in the past. they do a good job. but, again, it's a very difficult situation. you have 100 heads of state means you have 100 armed security details for those h